Kicker Nate Kaeding, obtained with one of the three draft picks the Chargers got that day along with Rivers, was released from injured reserve Tuesday and became a free agent.
He'll collect $1.1 million in termination pay.
The two other players the Chargers obtained with picks from the Rivers-Manning trade, outside linebacker Shawne Merriman and left tackle Roman Oben, are long gone.
"You get drafted, but you're not going to last somewhere forever," Kaeding said. "I think they got some decent mileage out of those draft picks."
Kaeding is the most accurate kicker in NFL history, having made 180 of 207 field goal attempts in the regular season, or 87 percent.
However, he'll be mostly remembered for the ones he didn't make in the playoffs.
He missed three field goals in a 17-14 home playoff loss to the New York Jets in January 2010, San Diego's last postseason appearance. As a rookie, he was wide right on a 40-yard attempt on a wet field in overtime that would have beaten the Jets in a playoff game following the 2004 season. The Jets moved down the field and won it 20-17 on Doug Brien's 27-yarder.
Kaeding was just 8 of 15 (53.3 percent) in eight playoff games.
Kaeding was placed on injured reserve on Oct. 22 with a groin injury. The Chargers said then he'd be released when he was healthy.
"I took the bye week as an extra week to get extra work on rehabbing my leg and the rest of my body," he said. "I came in fully expecting to play the Cleveland game, to kick Monday, Wednesday and Friday in practice and then jump on a plane and play. Obviously the team had other plans."
Kaeding made all seven field goal attempts this season. Last year, he blew out his left knee trying to make a tackle on the season's opening kickoff.
"It's mostly a waiting game," Kaeding said. "It's a week-to-week league, which I learned the hard way last year with my ACL. I'm just going to stay ready, try to stay patient and on top of my game.
"I'm certainly proud of the track record I have," he said. "There are no accidents in this league and it's a good measure of success. I'm confident and hopeful that I'll get another chance here down the road."
Copyright 2012 by The Associated Press